package com.itheima.reggie.common;

import com.baomidou.mybatisplus.core.handlers.MetaObjectHandler;
import lombok.extern.slf4j.Slf4j;
import org.apache.ibatis.reflection.MetaObject;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;

@Slf4j
@Component
public class MyMetaObjecthandler implements MetaObjectHandler {
    /**
     * 添加数据时，调用该方法，对公共字段自动填充
     * @param metaObject
     */
    @Override
    public void insertFill(MetaObject metaObject) {
        log.info("公共字段自动填充[insert]...");
        log.info(metaObject.toString());
        //strictInsertFill优势在于：当类中没有该属性时，就不会给该属性赋值，也不会出现异常
        strictInsertFill(metaObject,"createTime",LocalDateTime.class,LocalDateTime.now());
        strictInsertFill(metaObject,"updateTime",LocalDateTime.class,LocalDateTime.now());
        strictInsertFill(metaObject,"createUser",Long.class,BaseContext.getCurrentId());
        strictInsertFill(metaObject,"updateUser",Long.class,BaseContext.getCurrentId());

        //this.strictInsertFill(metaObject,"createTime",LocalDateTime.class,LocalDateTime.now());另一种自动填充方式
        //metaObject.setValue("createTime", LocalDateTime.now());
        //metaObject.setValue("updateTime", LocalDateTime.now());
        //metaObject.setValue("createUser", BaseContext.getCurrentId());
        //metaObject.setValue("updateUser", BaseContext.getCurrentId());

    }

    /**
     * 修改数据时，调用该方法，对公共字段自动填充
     * @param metaObject
     */
    @Override
    public void updateFill(MetaObject metaObject) {
        log.info("公共字段自动填充[update]...");
        log.info(metaObject.toString());

        //查看线程id
        long id = Thread.currentThread().getId();
        log.info("线程id为: {}",id);

        metaObject.setValue("updateTime", LocalDateTime.now());
        metaObject.setValue("updateUser", BaseContext.getCurrentId());
    }
}
